# MPP

The Machine Payments Protocol: a way for a server to ask for payment over HTTP, so an agent can pay for a call or a plan without a checkout page.

Also called Machine Payments Protocol.

Source: https://agentdrives.com/glossary/mpp · as data: https://agentdrives.com/glossary/mpp.json · licence CC BY 4.0

## In our drives

Each drive records whether the product takes MPP payments. Where it does, our agent may make one small payment there.

Agent payments in our data: https://agentdrives.com/data/payments?via=md

From the source: “Servers MUST return 402 with a WWW-Authenticate: Payment header when payment is required or when a payment credential fails validation” (IETF draft, checked 3 Oct 2026: https://www.ietf.org/archive/id/draft-httpauth-payment-01.txt)

## Products that offer MPP payments

11 of the 151 products we drove.

- [AgentMail](https://agentdrives.com/tools/agentmail.md?via=md): L4 Runs on its own
- [Firecrawl](https://agentdrives.com/tools/firecrawl.md?via=md): L4 Runs on its own
- [Parallel](https://agentdrives.com/tools/parallel.md?via=md): L4 Runs on its own
- [Stripe](https://agentdrives.com/tools/stripe.md?via=md): L3 Does the work
- [Tavily](https://agentdrives.com/tools/tavily.md?via=md): L3 Does the work
- [Browserbase](https://agentdrives.com/tools/browserbase.md?via=md): L2 Gets in
- [Exa](https://agentdrives.com/tools/exa.md?via=md): L2 Gets in
- [Apify](https://agentdrives.com/tools/apify.md?via=md): L1 Needs a person

## Related terms

- [x402](https://agentdrives.com/glossary/x402.md): An open payment standard built on HTTP's 402 Payment Required: the server answers a request with what it costs, and the agent pays and sends the request again.
- [Agentic commerce](https://agentdrives.com/glossary/agentic-commerce.md): AI agents buying for people and companies: finding the price, paying and getting what was paid for, with no person at the checkout.

Every term: https://agentdrives.com/glossary.md